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2017年托福語(yǔ)法介詞專項(xiàng)輔導(dǎo)
導(dǎo)語(yǔ)：介詞(又稱作前置詞，表示名詞、代詞等與句中其他詞的關(guān)系，在句中不能單獨(dú)作句子成分。下面YJBYS小編向大家介紹介詞的用法，希望對(duì)你有用!
1. between/among，between不一定只是兩者之間，among 一定是兩者以上
The distance/reaction between the stars/trees. 兩兩之間
among the two separate realms.領(lǐng)域 ×
2. in/for/since (與時(shí)態(tài)有關(guān))
(1) in + 時(shí)刻點(diǎn) eg: in 1979 用于一般過去時(shí)
in+一段時(shí)間 eg: in recent years 用于完成時(shí)態(tài), in two days 用于將來時(shí)態(tài)
(2) for 作爲(wèi)conj. “因?yàn)?rdquo;，引導(dǎo)塬因狀語(yǔ)從句，并列連詞,不能位于句首只能位于句中
for 作爲(wèi)prep. for+ 一段時(shí)間 for three years 可用于各種過去時(shí)態(tài)或完成時(shí)態(tài)
例題：
Adella Prentiss Hrghes (served) (as) (manager) of the Cleveland Orchestra (since) fifteen years.
答案: D sinceàfor
(3) since 作爲(wèi)conj., “因?yàn)?rdquo;“自從”， 引導(dǎo)塬因狀語(yǔ)從句，句首居多，Since +句子，句子。等于because
作爲(wèi)prep., “自從”+時(shí)刻點(diǎn)， eg: since 1949 用于完成時(shí)態(tài)(“自從”+句子，出現(xiàn)較少)
作爲(wèi)adv. A. 與完成時(shí)連用，表示過去某個(gè)時(shí)間某個(gè)事件到現(xiàn)在 since have done
B. 與過去時(shí)連用時(shí) = ago
例題：
50. Tom was elected (president) last semester, (but) he (since has devoted) (few) of his time to his job.
答案: D fewàlittle
51. The (oldest) public edifice in Washington D.C., the White House was (originally) constructed in the 1790’s, (also) has been rebuilt or extensively remodeled (three times since).
答案: C alsoàand
52. Eleanor Roosevelt (set) the standard against which the (wives) of (all) United States Presidents since have (evaluated).
答案: D evaluatedàbeen evaluated
3. through/ throughout
(1)through: “穿過”(某一具體物體) eg: through the earth
“通過”(某一具體方式)=by eg: through X-ray analyses
例題：
(Although) fluorine氟 (tests) and x-ray analyses, archaeologists (can prove) the (validity)合理性 of artifacts.
答案: A althoughàthough
(2)throughout +時(shí)間，“貫穿” eg: throughout his lifetime
(Throughout) the 1930’s, United States government (patronage the) arts (was concentrated) in the section of the Works Progress Administration (known as) Federal One.
答案: B patronage theà patronage to the
thoughout+地點(diǎn)，“遍佈” eg: throughout the world
例題：
(Serving) as chief of the United States Children’s Bureau from 1921 to 1934, Grace AbBott (fought) for the (rights) of women and children (through) the world.
答案: D throughàthroughout
4. in, inside /into
in, inside 表示靜態(tài)，強(qiáng)調(diào)一種狀態(tài) eg: air inside a house
into 表示動(dòng)態(tài)，強(qiáng)調(diào)一種動(dòng)作和過程 eg: shot arrows into the sky
(There is) evidence that the caribou originated (into) North America and crossed (over) a land bridge into Asia and (evolved) into the Old World’s reindeer.
答案: B intoàin
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